Totoo yan, normal lang yan lalo na kung baguhan ka pa lang sa pill! A friend of mine switched brands din and nakaranas ng ganyan, short bleeding on the brown pills for the first few cycles, tapos nag-settle na. Breakthrough bleeding or spotting happens kasi ang body mo ay nag-aadjust pa lang sa bagong hormone levels, especially sa first three months. Kung tuluy-tuloy yan after a few months, o kung may cramps or unusual symptoms, better check with your OB para sure lang. Pero based sa karanasan ng maraming girls around us, after 2-3 packs usually okay na!